Principal directive

There's a Star Trek mod - several, I think. I'm not sure what you mean, though.

The Prime Directive dictates that there can be no interference with the internal development of pre-warp civilizations, consistent with the historical real world concept of Westphalian sovereignty. It has special implications, however, for civilizations that have not yet developed the technology for interstellar spaceflight ("pre-warp"), since no primitive culture can be given or exposed to any information regarding advanced technology or the existence of extraplanetary civilizations, lest this exposure alter the natural development of the civilization.

There is some mod of it?